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* [Bug c/60139] New: Imprecise column number for -pedantic on non-computable initializer element
@ 2014-02-10 23:37 chengniansun at gmail dot com
  2014-02-11 10:12 ` [Bug c/60139] " mpolacek at gcc dot gnu.org
                   ` (3 more replies)
  0 siblings, 4 replies; 5+ messages in thread
From: chengniansun at gmail dot com @ 2014-02-10 23:37 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60139

            Bug ID: 60139
           Summary: Imprecise column number for -pedantic on
                    non-computable initializer element
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: chengniansun at gmail dot com

I have two questions regarding the warnings by gcc on array initializers. 
1) the column numbers in the warnings by -pedantic are not precise. 
2) the warning message says the warning is enabled by default, but in fact the
warning is only enabled with -pedantic. When I use the command 
    $gcc-trunk -c -std=c89 non-constant-initializers.c
then no warning is emitted.



$: cat non-constant-initializers.c 
void fn() {
  int a1;
  int *p1 = &a1;
  int** array[5] = 
  {&p1, 
        (void*)0, (void*)0, (void*)0, &p1};

}
$: gcc-trunk -c -std=c89 -pedantic non-constant-initializers.c 
non-constant-initializers.c: In function ‘fn’:
non-constant-initializers.c:5:3: warning: initializer element is not computable
at load time [enabled by default]
   {&p1, 
   ^
non-constant-initializers.c:6:9: warning: initializer element is not computable
at load time [enabled by default]
         (void*)0, (void*)0, (void*)0, &p1};
         ^
$: gcc-trunk -c -std=c89 non-constant-initializers.c 
$: 
$:
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From: "hubicka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug lto/59468] [4.9 Regression] ICE on invalid C++ code with LTO in gimple_get_virt_method_for_binfo, at gimple-fold.c:3224
Date: Tue, 11 Feb 2014 00:13:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?idY468

--- Comment #9 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
The ICE is already fixed by my reorg of gimple_get_virt_method_for_vtable.
I am experimenting with patch that adds a warning.

Honza


^ permalink raw reply	[flat|nested] 5+ messages in thread
end of thread, other threads:[~2021-07-29 17:26 UTC | newest]

Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2014-02-10 23:37 [Bug c/60139] New: Imprecise column number for -pedantic on non-computable initializer element chengniansun at gmail dot com
2014-02-11 10:12 ` [Bug c/60139] " mpolacek at gcc dot gnu.org
2014-04-30  6:15 ` mpolacek at gcc dot gnu.org
2014-04-30  6:15 ` mpolacek at gcc dot gnu.org
2021-07-29 17:26 ` pinskia at gcc dot gnu.org

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